Police "disappeared" more than 7,000 people at an off-the-books interrogation warehouse in Chicago, nearly twice as many detentions as previously disclosed, the Guardian can now reveal. From August 2004 to June 2015, nearly 6,000 of those held at the facility were black, which represents more than twice the proportion of the city's population. But only 68 of those held were allowed access to attorneys or a public notice of their whereabouts, internal police records show.

The new disclosures, the result of an ongoing Guardian transparency lawsuit and investigation, provide the most detailed, full-scale portrait yet of the truth about Homan Square, a secretive facility that Chicago police have described as little more than a low-level narcotics crime outpost where the mayor has said police "follow all the rules".

The police portrayals contrast sharply with those of Homan Square detainees and their lawyers, who insist that "if this could happen to someone, it could happen to anyone". A 30-year-old man named Jose, for example, was one of the few detainees with an attorney present when he surrendered to police. He said officers at the warehouse questioned him even after his lawyer specifically told them he would not speak. "The Fillmore and Homan boys", Jose said, referring to police and the facility's cross streets, "don't play by the rules".